Implement Start Resolution for preview render in BI

So now viewport render resolution division works exactly the same as in Cycles.

1 files changed, 9 insertions, 1 deletions

diff --git a/source/blender/makesrna/intern/rna_scene.c b/source/blender/makesrna/intern/rna_scene.c
index bce7d0062f2..13349446168 100644
--- a/source/blender/makesrna/intern/rna_scene.c
+++ b/source/blender/makesrna/intern/rna_scene.c
@@ -4436,7 +4436,15 @@ static void rna_def_scene_render_data(BlenderRNA *brna)
 	RNA_def_property_range(prop, 8, 65536);
 	RNA_def_property_ui_text(prop, "Tile Y", "Vertical tile size to use while rendering");
 	RNA_def_property_update(prop, NC_SCENE | ND_RENDER_OPTIONS, NULL);
-	
+
+	prop = RNA_def_property(srna, "preview_start_resolution", PROP_INT, PROP_NONE);
+	RNA_def_property_clear_flag(prop, PROP_ANIMATABLE);
+	RNA_def_property_range(prop, 8, 16384);
+	RNA_def_property_int_default(prop, 64);
+	RNA_def_property_ui_text(prop, "Start Resolution", "Resolution to start rendering preview at, "
+	                                                   "progressively increasing it to the full viewport size");
+	RNA_def_property_update(prop, NC_SCENE | ND_RENDER_OPTIONS, NULL);
+
 	prop = RNA_def_property(srna, "pixel_aspect_x", PROP_FLOAT, PROP_NONE);
 	RNA_def_property_float_sdna(prop, NULL, "xasp");
 	RNA_def_property_flag(prop, PROP_PROPORTIONAL);